So with the seat squared away, back to the dash. Now I could sit in the seat and move the gauge and switches around till I was happy. Main goals here were to have minimal gauge/steering wheel overlap, switches located logically and such that you did not have to cover one switch with your hand whilst you activated another, and also located items like horns and indicators close to hand.
An early layout version is below
Then I decided to ditch the radio and the clock because I felt they cluttered the dash too much. Plus, do I really need another clock?
Anyway, more fiddling, plotting out fullsize ACAD drawings etc, I settled on this.
That's an indicator switch on the very right. Not self-cancelling, so I will add a buzzer (as required).
A close up on the switches below, red switch is to crank the starter motor.
And installed with the steering wheel.
Overall, pretty happy. I think it meets my goals and is not so different from original to look in-keeping with the Cobra's heritage.